x/2+9=12 - solution

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Solution for x/2+9=12 equation:

x in (-oo:+oo)

x/2+9 = 12 // - 12

x/2-12+9 = 0

1/2*x-3 = 0 // + 3

1/2*x = 3 // : 1/2

x = 3/1/2

x = 6

x = 6

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